<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <meta http-equiv="X-UA-Compatible" content="IE=edge">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>Document</title>
    <style>
        *{
            padding: 0;
            margin: 0;
        }
        body {
            background-color: slateblue;
            background-size: cover;
        }
    </style>
</head>
<body>
    <div id="container">
        <h1>注册界面</h1>
        <form action="/register/in" method="post">
            用户名
            <input 
            type="text"
            placeholder="请输入管理员账号"
            id="username"
            name="username"
            >


            密码
            <input 
            type="text"
            placeholder="请输入密码"
            id="password"
            name="password"
            >

            
            邀请码
            <input 
            type="text"
            placeholder="请输入邀请码"
            id="yaoqingma"
            name="yaoqingma"
            >

            <button type="submit">点击注册</button>
        </form>
    </div>
</body>
</html>